🔥(terraform) remove legacy terraform and OpenStack references

Some outdated references to Terraform and OpenStack were missed during
the project quickstart. These are legacy elements inherited from OpenFun.

This commit cleans up the codebase.

.gitignore

@@ -42,7 +42,6 @@ env.bak/
 venv.bak/
 env.d/development/*
 !env.d/development/*.dist
-env.d/terraform
 
 # npm
 node_modules
@@ -59,11 +58,6 @@ src/frontend/tsclient
 # Logs
 *.log
 
-# Terraform
-.terraform
-*.tfstate
-*.tfstate.backup
-
 # Test & lint
 .coverage
 coverage.json